instrumented safety systems - aisisa.it
TRANSCRIPT
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Instrumented Safety Systems
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Engineered Valve Systems forControl and Safety Applications
Examples
DINO OLIVIERIMokveld Agent
AIS – ISA Giornata di studio HIPPS
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Mokveld Mechanical HIPPS
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• Complete integrated safety shut-down system• Easy identified and simple system• Reduced cost• Stand-alone system operated with line gas without
permanent gas consumption
Mokveld mechanical HIPPS
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Mokveld mechanical initiator with 1% accuracy• Since 1974 DVGW / DIN 3381
certified minus 30 to plus 60 deg C
• 1% Accuracy on setpoint
• Hydraulic version:7,72 E-4 / year
• Proven in use according IEC61511
• Complete system of Final element and mechanical initiators TUV certified:Unclean duty, 1 year prooftest,Pneumatic 90% confidencePFD = 8,6 E-4
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Aspect Electrical MechanicalDistance sensing point anywhere up to approx. 8 m.Availability (1) defined undefinedAvailability (2) 1oo1, 1oo2 and 2oo3 1oo1 and 1oo2
Cabling each PT, solenoid and limit switch for each limit switch
Sequence of event recorder yes by means of DCS with limit switches
Accuracy of set point 0,25% 1,0%Pressure reading on DCS yes no
Notification of switching yes by means of limit switch on pressure switch
Calibration / maintenance of sensor without closure yes no
Mechanical versus electrical HIPPS
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• Mechanical HIPPS+ Plug and play+ Stand alone+ Low price for single system+ Simple+ Safe and certified+ Mechanical components
± Status information
- Sensing line position- Pressure switch configuration- No diagnostics
Mechanical versus electrical HIPPS
Electrical HIPPS+ Remote sensors+ One sensing unit for parallel
streams+ Sensing unit 2oo3 configuration+ Sensor connection to pipeline+ Status information+ Diagnostics+ Partial system test
- Complex system with many components
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Mokveld Mechanical HIPPS
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Mokveld Mechanical HIPPS
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Mokveld Mechanical HIPPS
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Mokveld Mechanical HIPPS
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Hybrid HIPPS/ESD
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Topside production facility - 1
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Topside production facility - 2
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Topside production facility - 3
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Topside production facility - 4
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Example in Europe
Location : NAM Netherlands mobile production unitSpecs : 1oo2 Mechanical HIPPS protecting ANSI 900
pipeline against pressure from ANSI 2500 wellhead
Introduction into HIPPS E L2 R0 slide 17
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Example in Europe
Location : Dong Denmark NybroSpecs : 1oo2 Electronic HIPPS protecting ANSI 600 onshore
installation against pressure from ANSI 900 pipeline
Introduction into HIPPS E L2 R0 slide 18
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Example in Europe
Location : Statoil Germany Zeepipe landfall Specs : 1oo2 Mechanical HIPPS protecting ANSI 600 onshore
installation against pressure from ANSI 900 pipeline
Introduction into HIPPS E L2 R0 slide 19
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We thank you for your attention